The purpose of this study is to determine and compare the efficacy of Campath-1H/Tacrolimus versus ATG/Tacrolimus/MMF therapy in conjunction with initial short-term steroids in Type 1-diabetic patients undergoing simultaneous pancreas-kidney allograft transplantation as well as to evaluate the safety of Campath-1H/Tacrolimus versus ATG/Tacrolimus/MMF in terms of drug-related complications and immunosuppression-associated complications.